Results 41 to 50 of about 345,283 (169)

Invariants of 2+1 Quantum Gravity

, 1992
In [1,2] we established and discussed the algebra of observables for 2+1 gravity at both the classical and quantum level. Here our treatment broadens and extends previous results to any genus $g$ with a systematic discussion of the centre of the algebra.
J. E. Nelson, J.E. Nelson, J.E. Nelson, J.E. Nelson, J.S. Birman, T. Regge   +5 more
core   +1 more source

Towards multi-modal and cross-modal integration in LiFi-based sensing

Scientific Reports
Sensing and localization are envisioned to play key role in shaping the future of the sixth-generation (6G) of wireless networks by enhancing their ability to make intelligent decisions. Existing research efforts have focused on utilizing radio-frequency
Shimaa Naser, Omar Alhussein, Sami Muhaidat   +2 more
doaj   +1 more source

Required Restrictions on Characteristics of 4G/5G Mobile (Cellular) Communications to Ensure their Safety for Users

Доклады Белорусского государственного университета информатики и радиоэлектроники, 2022
Implementation of intensive development of technologies, systems, and services of mobile (cellular) communications (CC) of the fourth (4G) and fifth (5G), and by 2030 also the sixth (6G) generation, implying an increase by many orders of magnitude in the
V. I. Mordachev
doaj   +1 more source

6G Frontiers

, 2022
6G Frontiers offers intelligent insight into the ongoing research trends, use cases, and key developmental technologies powering the upcoming 6G framework. The authors cover a myriad of important topics that intersect with 6G, such as hyper-intelligent networking, security, privacy, and trust, harmonized mobile networks, legal views, and standards ...
De Alwis, Chamitha, Pham, Quoc-Viet, Liyanage, Madhusanka   +2 more
openaire   +2 more sources

Energy-Efficient Joint User Association, Backhaul Bandwidth Allocation, and Power Allocation in Cell-Free mmWave UAV Networks

Drones
In this article, we propose a cell-free network architecture for an unmanned aerial vehicle (UAV) base station (BS), i.e., UBS, incorporating high-altitude platform stations (HAPSs) as central processing units (CPUs). The goal is to guarantee the quality
Zhiwei Si, Zheng Jiang, Kaisa Zhang, Qian Liu, Jianchi Zhu, Xiaoming She, Peng Chen   +6 more
doaj   +1 more source

Enhancing 5G propagation into vehicles and buildings using optically transparent and polarisation insensitive metasurfaces over wide-incidence angles

Scientific Reports
This article introduces two transmissive metasurfaces applied to normal windows, aiming to improve the 5G outdoor-to-indoor (O2I) coverage. These windows can be utilized in various settings, such as vehicles or buildings.
Amirmasood Bagheri, Shadi Danesh, Fan Wang, Seyed Ehsan Hosseininejad, Mohsen Khalily, Rahim Tafazolli   +5 more
doaj   +1 more source

A Measurement-Based Power Consumption Model for Networks With Intelligent Control (RIC)

IEEE Open Journal of the Communications Society
Open Radio Access Network (Open RAN) triggers a shift towards multi-vendor deployments with increased programmability, flexibility, and intelligence. Still, several critical questions remain unanswered, particularly regarding Open RAN's impact on power ...
Joao Paulo S. H. Lima, George N. Katsaros, Rahim Tafazolli, Konstantinos Nikitopoulos   +3 more
doaj   +1 more source

Multi-Connectivity in 5G and Beyond Non-Terrestrial Networks

Journal of Communications Software and Systems, 2022
The Fifth Generation (5G) communications systems aim to serve such service classes as Ultra-Reliable Low Latency Communications (URLLC), enhanced Mobile Broadband (eMBB), and massive Machine-Type Communications (mMTC).
Mikko Majamaa, Henrik Martikainen, Lauri Sormunen, Jani Puttonen   +3 more
doaj   +1 more source

Polarisation reconfigurable anisotropic dielectric resonator antenna

Scientific Reports
A novel polarization reconfigurable anisotropic dielectric resonator antenna (ADRA) is presented utilizing a new modulation scheme to exploit the degree of freedom in the polarization domain.
Shadi Danesh, Mohammad Abedian, Mohsen Khalily, Pei Xiao, Rahim Tafazolli, Ahmed A. Kishk   +5 more
doaj   +1 more source

Performance Analysis of CR-Enabled AmBC NOMA Under IQI and Sensitivity Constraints

IEEE Access
Considering tag sensitivity and in-phase and quadrature-phase imbalance (IQI), this paper investigates the reliability and security of a cognitive radio (CR)-aided ambient backscatter communication (AmBC) non-orthogonal multiple access (NOMA) system ...
Wenjing Zhao, Nanxi Li, Jing Guo, Jianchi Zhu, Yi Gu, Gongpu Wang, Chintha Tellambura   +6 more
doaj   +1 more source